By whom was it discovered是什么意思?

By whom was it discovered是什么意思? .那是不是whom was it invented by 0.0 英语who was it invented by 用who 还是whom?用who 还是whom? Whom was Tom saved by翻译 英语who was it invented by 用who 还是whom?教科书中是who 为什么有作业本上是whom呢 求教 不要复制或者长篇大论~ 简练 disco DISCO Who wrote it?=By whom _____ it _____? By whom was Tom made ______ (clean) the garden? 本人欠缺语法点,求大师指点.最好指出语法点的名称.此处的“to whom ” 为什么是 toto authenticate an art object,determining whether it was indeed made by the artist to whom it is traditionally attributed. who was the book weitten by?和whom was the book written by?有什么区别? this is a wonderfl composition,i wonder ——A.who is it written byB.who was it written byc.by whom it was writtend.who did write it I don't know whom I should ask for help(该为简单句)was it worn by the kings in ancient times?(做回答) it was in the lab ___was taken charge of by Professor Harris __they did the experimentA which that B that where C whom that D which where The star is to be named after Patrick Jenks,by whom it was discovered.这句话我知道大概意思但不知道具体怎么翻译.. Do you know by whom the light bulb was invented? by whom是怎么理解的 再举些例子吧! 急! Whom was tea ( ) A invent by B invented of C invented by D invented from By whom was the novel written?为什么用was不用did?